Livingstone, Missionary Travels and Researches in South Africa (London, 1857), p. 64.
Barth, Travels and Discoveries in North and Central Africa (London, 1857), vol. ii. p. 469; the tributary is the Faro; Yola is the adjacent town.
Grant, Walk across Africa (London, 1864), p. 304.
Condamine, M. de la, Relation abrégée d’un voyage fait dans l’intérieur de l’Amérique méridionale (Paris, 1745), p. 63 (at Laguna).
P. 195. Wilson, Prehistoric Man (London, 1862), vol. i. p. 169.
Bartram, Travels through N. and S. Carolina, Georgia, &c. (London, 1792), p. 225.
Kalm, Travels into N. America (London, 1771), vol. ii. pp. 240-2.
Pliny, xvi. 40 Germaniae praedones singulis arboribus cavatis navigant, quarum quaedam et triginta homines ferunt.
Keller, Lake Dwellings of Switzerland (transl. by J. E. Lee, 2nd ed., 1878), p. 45, Pl. x. 8.
Sir W. Wilde, Catalogue of the Antiquities of the Museum of the Royal Irish Academy (Dublin, 1863), vol. i. pp. 202-4.